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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Number of Common Shares outstanding | Treasury Shares | Additional Paid-In Capital | Retained earnings (accumulated deficit) | Accumulated other comprehensive loss | Noncontrolling interest | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 |  | $ (4,208) | $ 199,254 | $ (32,105) | $ (69,822) | $ 13,310 | $ 106,429 |
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2015 | 27,912 |  |  |  |  |  |  |
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2015 |  | 995 |  |  |  |  |  |
Net income (loss) |  |  |  | 77,461 |  | (1,887) | 75,574 |
Benefit plan liability adjustments, net |  |  |  |  | (84) |  | (84) |
Unrealized gain (loss) on derivatives |  |  |  |  | (408) |  | (408) | [1]
Currency translation adjustments |  |  |  |  | 2,401 | 2,339 | 4,740 |
Issuance of restricted Common Shares ( in shares) | 67 | (8) |  |  |  |  |  |
Forfeited restricted Common Shares ( in shares) | (3) | 3 |  |  |  |  |  |
Repurchased Common Shares for treasury |  | $ (1,424) |  |  |  |  | (1,424) |
Repurchased Common Shares for treasury (in shares) | (126) | 126 |  |  |  |  |  |
Tax benefit from share based compensation transactions |  |  | 977 |  |  |  | 977 |
Share-based compensation |  |  | 6,273 |  |  |  | 6,273 |
Balance at Dec. 31, 2016 |  | $ (5,632) | 206,504 | 45,356 | (67,913) | 13,762 | 192,077 |
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2016 | 27,850 |  |  |  |  |  |  |
Treasury Stock, Shares, Ending Balance at Dec. 31, 2016 |  | 1,116 |  |  |  |  |  |
Net income (loss) |  |  |  | 45,179 |  | (130) | 45,049 |
Unrealized gain (loss) on derivatives |  |  |  |  | (125) |  | (125) | [1]
Currency translation adjustments |  |  |  |  | 15,473 | 826 | 16,299 |
Acquisition of noncontrolling interest, net |  |  | 15,820 |  | (16,995) | $ (14,458) | (15,633) |
Issuance of restricted Common Shares ( in shares) | 462 | (462) |  |  |  |  |  |
Repurchased Common Shares for treasury |  | $ (1,486) |  |  |  |  | (1,486) |
Repurchased Common Shares for treasury (in shares) | (132) | 132 |  |  |  |  |  |
Share-based compensation |  |  | 6,162 |  |  |  | 6,162 |
Balance at Dec. 31, 2017 |  | $ (7,118) | 228,486 | 92,264 | (69,560) |  | $ 244,072 |
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2017 | 28,180 |  |  |  |  |  | 28,180 |
Treasury Stock, Shares, Ending Balance at Dec. 31, 2017 |  | 786 |  |  |  |  | 786 |
Cumulative effect of a accounting change | ASU 2016-09 |  |  |  | 1,729 |  |  | $ 1,729 |
Net income (loss) |  |  |  | 53,848 |  |  | 53,848 |
Unrealized gain (loss) on derivatives |  |  |  |  | 435 |  | 435 | [1]
Currency translation adjustments |  |  |  |  | (16,627) |  | (16,627) |
Issuance of restricted Common Shares ( in shares) | 461 | (461) |  |  |  |  |  |
Repurchased Common Shares for treasury |  | $ (1,762) |  |  |  |  | (1,762) |
Repurchased Common Shares for treasury (in shares) | (153) | 153 |  |  |  |  |  |
Share-based compensation |  |  | 3,161 |  |  |  | 3,161 |
Balance at Dec. 31, 2018 |  | $ (8,880) | $ 231,647 | 146,251 | $ (85,752) |  | $ 283,266 |
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2018 | 28,488 |  |  |  |  |  | 28,488 |
Treasury Stock, Shares, Ending Balance at Dec. 31, 2018 |  | 478 |  |  |  |  | 478 |
Cumulative effect of a accounting change |  |  |  | $ 139 |  |  | $ 139 |
[1] | Net of tax expense (benefit) of $156, $(68) and $(10) for the years ended December 31, 2018, 2017 and 2016, respectively.

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